Ultrastructural analysis of Balbiani ring genes of Chironomus pallidivittatus in different states of Balbiani ring activity

Chromosoma ◽  
1993 ◽  
Vol 102 (7) ◽  
pp. 433-445 ◽  
Author(s):  
Hans-H. Trepte
Keyword(s):  
Ultrastructural Analysis ◽  
Balbiani Ring ◽  
Balbiani Ring Genes

Balbiani ring genes and their induction

1984 ◽  
pp. 153-160 ◽  
Author(s):  
R. Galler ◽  
N. Riedel ◽  
L. Rydlander ◽  
J.-E. Edström
Keyword(s):  
Balbiani Ring ◽  
Balbiani Ring Genes

Conserved and nonconserved structures in the secretory proteins encoded in the Balbiani ring genes ofChironomus tentans

1984 ◽  
Vol 20 (3-4) ◽  
pp. 304-312 ◽  
Author(s):  
L. Wieslander ◽  
C. Höög ◽  
J. -O. Höög ◽  
H. Jörnvall ◽  
U. Lendahl ◽  
...  
Keyword(s):  
Secretory Proteins ◽  
Balbiani Ring ◽  
Balbiani Ring Genes

Rapid reformation of the thick chromosome fiber upon completion of RNA synthesis at the Balbiani ring genes in Chironomus tentans

Chromosoma ◽  
1982 ◽  
Vol 87 (1) ◽  
pp. 33-48 ◽  
Author(s):  
K. Andersson ◽  
R. M�hr ◽  
B. Bj�rkroth ◽  
B. Daneholt
Keyword(s):  
Rna Synthesis ◽  
Chironomus Tentans ◽  
Balbiani Ring ◽  
Balbiani Ring Genes

Identification of the spI products of Balbiani ring genes in Chironomus thummi

Chromosoma ◽  
1989 ◽  
Vol 98 (6) ◽  
pp. 428-432 ◽  
Author(s):  
E. Cort�s ◽  
L. M. Botella ◽  
D. Barettino ◽  
J. L. D�ez
Keyword(s):  
Balbiani Ring ◽  
Balbiani Ring Genes ◽  
Chironomus Thummi

scholarly journals Developmentally regulated expression of a Balbiani ring 1 gene for a 180-kD secretory polypeptide in Chironomus tentans salivary glands before larval/pupal ecdysis.

1988 ◽  
Vol 106 (1) ◽  
pp. 21-27 ◽  
Author(s):  
T D Dreesen ◽  
M Lezzi ◽  
S T Case
Keyword(s):  
Salivary Gland ◽  
Larval Instar ◽  
State Level ◽  
Fold Increase ◽  
Balbiani Ring ◽  
Developmentally Regulated ◽  
Feeding Tubes ◽  
Balbiani Ring Genes ◽  
Salivary Gland Protein

The expression of a Balbiani ring 1 gene that codes for a salivary gland-specific 180-kD secretory polypeptide (sp180) is regulated developmentally. Immunoblots of salivary gland protein incubated with an affinity-purified nonapeptide-reactive antibody demonstrated that the salivary gland content of sp180 increases as much as 10-fold between stages 8 and 10 of the fourth larval instar. Hybridization of RNA dot-blots with an oligonucleotide probe indicated that the observed increase in sp180 was preceded by a parallel 20-fold increase in the steady state level of its mRNA beginning between stages 7 and 8. In vitro nuclear transcription experiments demonstrated that there was a 10-fold acceleration in the rate of sp180 gene transcription between stages 6 and 10. The limited period of expression of the sp180 gene contrasted dramatically with the expression of Balbiani ring genes BR1, BR2 alpha, BR2 beta, and BR6, which code for the sp-I family of fibrous secretory polypeptides. The appearance of sp180 in secretion coincided with microscopically visible changes in the bundling of these fibrous polypeptides. At the same time, we noticed changes in the appearance and consistency of feeding tubes that larvae construct with this secretion. These results lead us to propose that sp180 may modify the structure or utilization of fibrous secretory polypeptides specifically for the assembly of pupation tubes necessary for larval/pupal ecdysis.

scholarly journals The Chironomus tentans genome sequence and the organization of the Balbiani ring genes

BMC Genomics ◽  
2014 ◽  
Vol 15 (1) ◽  
pp. 819 ◽  
Author(s):  
Alexey Kutsenko ◽  
Thomas Svensson ◽  
Björn Nystedt ◽  
Joakim Lundeberg ◽  
Petra Björk ◽  
...  
Keyword(s):  
Genome Sequence ◽  
Chironomus Tentans ◽  
Balbiani Ring ◽  
Balbiani Ring Genes
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